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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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631 lines
17 KiB
C
631 lines
17 KiB
C
/* GStreamer
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* Copyright (C) 2006 Josep Torra <josep@fluendo.com>
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* 2006 Mathieu Garcia <matthieu@fluendo.com>
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* 2006,2007 Stefan Kost <ensonic@users.sf.net>
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* 2008 Sebastian Dröge <slomo@circular-chaos.org>
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*
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* gstregistrybinary.c: GstRegistryBinary object, support routines
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/* FIXME:
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* - keep registry binary blob and reference strings
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* - don't free/unmmap contents when leaving gst_registry_binary_read_cache()
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* - free at gst_deinit() / _priv_gst_registry_cleanup() ?
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* - GstPlugin:
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* - GST_PLUGIN_FLAG_CONST
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* - GstPluginFeature, GstIndexFactory, GstElementFactory
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* - needs Flags (GST_PLUGIN_FEATURE_FLAG_CONST)
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* - can we turn loaded into flag?
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* - why do we collect a list of binary chunks and not write immediately
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* - because we need to process subchunks, before we can set e.g. nr_of_items
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* in parent chunk
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <errno.h>
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#include <stdio.h>
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#if defined (_MSC_VER) && _MSC_VER >= 1400
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#include <io.h>
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#endif
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#include <gst/gst_private.h>
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#include <gst/gstconfig.h>
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#include <gst/gstelement.h>
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#include <gst/gsttypefind.h>
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#include <gst/gsttypefindfactory.h>
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#include <gst/gsturi.h>
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#include <gst/gstinfo.h>
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#include <gst/gstenumtypes.h>
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#include <gst/gstpadtemplate.h>
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#include <gst/gstregistrychunks.h>
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#include <gst/gstregistrybinary.h>
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#include <glib/gstdio.h> /* for g_stat(), g_mapped_file(), ... */
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#include "glib-compat-private.h"
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#define GST_CAT_DEFAULT GST_CAT_REGISTRY
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/* reading macros */
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#define unpack_element(inptr, outptr, element, endptr, error_label) G_STMT_START{ \
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if (inptr + sizeof(element) >= endptr) \
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goto error_label; \
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outptr = (element *) inptr; \
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inptr += sizeof (element); \
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}G_STMT_END
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#define ALIGNMENT (sizeof (void *))
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#define alignment(_address) (gsize)_address%ALIGNMENT
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#define align(_ptr) _ptr += (( alignment(_ptr) == 0) ? 0 : ALIGNMENT-alignment(_ptr))
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/* Registry saving */
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#ifdef G_OS_WIN32
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/* On win32, we can't use g_mkstmp(), because of cross-DLL file I/O problems.
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* So, we just create the entire binary registry in memory, then write it out
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* with g_file_set_contents(), which creates a temporary file internally
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*/
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typedef struct BinaryRegistryCache
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{
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const char *location;
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guint8 *mem;
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gssize len;
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} BinaryRegistryCache;
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static BinaryRegistryCache *
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gst_registry_binary_cache_init (GstRegistry * registry, const char *location)
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{
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BinaryRegistryCache *cache = g_slice_new0 (BinaryRegistryCache);
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cache->location = location;
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return cache;
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}
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static int
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gst_registry_binary_cache_write (BinaryRegistryCache * cache,
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unsigned long offset, const void *data, int length)
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{
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cache->len = MAX (offset + length, cache->len);
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cache->mem = g_realloc (cache->mem, cache->len);
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memcpy (cache->mem + offset, data, length);
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return length;
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}
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static gboolean
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gst_registry_binary_cache_finish (BinaryRegistryCache * cache, gboolean success)
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{
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gboolean ret = TRUE;
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GError *error = NULL;
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if (!g_file_set_contents (cache->location, (const gchar *) cache->mem,
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cache->len, &error)) {
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/* Probably the directory didn't exist; create it */
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gchar *dir;
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dir = g_path_get_dirname (cache->location);
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g_mkdir_with_parents (dir, 0777);
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g_free (dir);
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g_error_free (error);
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error = NULL;
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if (!g_file_set_contents (cache->location, (const gchar *) cache->mem,
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cache->len, &error)) {
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/* Probably the directory didn't exist; create it */
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gchar *dir;
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dir = g_path_get_dirname (cache->location);
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g_mkdir_with_parents (dir, 0777);
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g_free (dir);
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g_error_free (error);
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error = NULL;
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if (!g_file_set_contents (cache->location, (const gchar *) cache->mem,
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cache->len, &error)) {
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GST_ERROR ("Failed to write to cache file: %s", error->message);
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g_error_free (error);
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ret = FALSE;
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}
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}
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}
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g_free (cache->mem);
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g_slice_free (BinaryRegistryCache, cache);
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return ret;
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}
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#else
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typedef struct BinaryRegistryCache
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{
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const char *location;
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char *tmp_location;
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unsigned long currentoffset;
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int cache_fd;
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} BinaryRegistryCache;
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static BinaryRegistryCache *
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gst_registry_binary_cache_init (GstRegistry * registry, const char *location)
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{
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BinaryRegistryCache *cache = g_slice_new0 (BinaryRegistryCache);
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cache->location = location;
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cache->tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
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cache->cache_fd = g_mkstemp (cache->tmp_location);
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if (cache->cache_fd == -1) {
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int ret;
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GStatBuf statbuf;
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gchar *dir;
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/* oops, I bet the directory doesn't exist */
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dir = g_path_get_dirname (location);
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g_mkdir_with_parents (dir, 0777);
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ret = g_stat (dir, &statbuf);
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if (ret != -1 && (statbuf.st_mode & 0700) != 0700) {
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g_chmod (dir, 0700);
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}
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g_free (dir);
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/* the previous g_mkstemp call overwrote the XXXXXX placeholder ... */
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g_free (cache->tmp_location);
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cache->tmp_location = g_strconcat (location, ".tmpXXXXXX", NULL);
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cache->cache_fd = g_mkstemp (cache->tmp_location);
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if (cache->cache_fd == -1) {
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GST_DEBUG ("g_mkstemp() failed: %s", g_strerror (errno));
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g_free (cache->tmp_location);
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g_slice_free (BinaryRegistryCache, cache);
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return NULL;
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}
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ret = g_stat (cache->tmp_location, &statbuf);
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if (ret != -1 && (statbuf.st_mode & 0600) != 0600) {
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g_chmod (cache->tmp_location, 0600);
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}
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}
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return cache;
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}
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static int
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gst_registry_binary_cache_write (BinaryRegistryCache * cache,
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unsigned long offset, const void *data, int length)
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{
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long written;
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if (offset != cache->currentoffset) {
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if (lseek (cache->cache_fd, offset, SEEK_SET) != 0) {
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GST_ERROR ("Seeking to new offset failed");
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return FALSE;
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}
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cache->currentoffset = offset;
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}
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written = write (cache->cache_fd, data, length);
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if (written != length) {
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GST_ERROR ("Failed to write to cache file");
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}
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cache->currentoffset += written;
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return written;
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}
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static gboolean
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gst_registry_binary_cache_finish (BinaryRegistryCache * cache, gboolean success)
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{
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/* only fsync if we're actually going to use and rename the file below */
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if (success && fsync (cache->cache_fd) < 0)
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goto fsync_failed;
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if (close (cache->cache_fd) < 0)
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goto close_failed;
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if (success) {
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/* Only do the rename if we wrote the entire file successfully */
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if (g_rename (cache->tmp_location, cache->location) < 0) {
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GST_ERROR ("g_rename() failed: %s", g_strerror (errno));
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goto rename_failed;
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}
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}
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g_free (cache->tmp_location);
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g_slice_free (BinaryRegistryCache, cache);
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GST_INFO ("Wrote binary registry cache");
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return TRUE;
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/* ERRORS */
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fail_after_close:
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{
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g_unlink (cache->tmp_location);
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g_free (cache->tmp_location);
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g_slice_free (BinaryRegistryCache, cache);
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return FALSE;
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}
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fsync_failed:
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{
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GST_ERROR ("fsync() failed: %s", g_strerror (errno));
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goto fail_after_close;
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}
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close_failed:
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{
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GST_ERROR ("close() failed: %s", g_strerror (errno));
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goto fail_after_close;
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}
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rename_failed:
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{
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GST_ERROR ("g_rename() failed: %s", g_strerror (errno));
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goto fail_after_close;
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}
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}
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#endif
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/*
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* gst_registry_binary_write_chunk:
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*
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* Write from a memory location to the registry cache file
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*
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* Returns: %TRUE for success
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*/
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inline static gboolean
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gst_registry_binary_write_chunk (BinaryRegistryCache * cache,
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GstRegistryChunk * chunk, unsigned long *file_position)
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{
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gchar padder[ALIGNMENT] = { 0, };
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int padsize = 0;
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/* Padding to insert the struct that requiere word alignment */
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if ((chunk->align) && (alignment (*file_position) != 0)) {
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padsize = ALIGNMENT - alignment (*file_position);
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if (gst_registry_binary_cache_write (cache, *file_position,
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padder, padsize) != padsize) {
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GST_ERROR ("Failed to write binary registry padder");
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return FALSE;
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}
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*file_position += padsize;
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}
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if (gst_registry_binary_cache_write (cache, *file_position,
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chunk->data, chunk->size) != chunk->size) {
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GST_ERROR ("Failed to write binary registry element");
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return FALSE;
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}
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*file_position += chunk->size;
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return TRUE;
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}
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/*
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* gst_registry_binary_initialize_magic:
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*
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* Initialize the GstBinaryRegistryMagic, setting both our magic number and
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* gstreamer major/minor version
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*/
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inline static gboolean
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gst_registry_binary_initialize_magic (GstBinaryRegistryMagic * m)
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{
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memset (m, 0, sizeof (GstBinaryRegistryMagic));
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if (!strncpy (m->magic, GST_MAGIC_BINARY_REGISTRY_STR,
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GST_MAGIC_BINARY_REGISTRY_LEN)
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|| !strncpy (m->version, GST_MAGIC_BINARY_VERSION_STR,
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GST_MAGIC_BINARY_VERSION_LEN)) {
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GST_ERROR ("Failed to write magic to the registry magic structure");
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return FALSE;
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}
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return TRUE;
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}
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/**
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* gst_registry_binary_write_cache:
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* @registry: a #GstRegistry
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* @location: a filename
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*
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* Write the @registry to a cache to file at given @location.
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*
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* Returns: %TRUE on success.
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*/
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gboolean
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priv_gst_registry_binary_write_cache (GstRegistry * registry,
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const char *location)
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{
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GList *walk;
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GstBinaryRegistryMagic magic;
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GList *to_write = NULL;
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unsigned long file_position = 0;
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BinaryRegistryCache *cache;
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GST_INFO ("Building binary registry cache image");
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g_return_val_if_fail (GST_IS_REGISTRY (registry), FALSE);
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if (!gst_registry_binary_initialize_magic (&magic))
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goto fail;
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/* iterate trough the list of plugins and fit them into binary structures */
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for (walk = registry->plugins; walk; walk = g_list_next (walk)) {
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GstPlugin *plugin = GST_PLUGIN (walk->data);
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if (!plugin->filename)
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continue;
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if (plugin->flags & GST_PLUGIN_FLAG_CACHED) {
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GStatBuf statbuf;
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if (g_stat (plugin->filename, &statbuf) < 0 ||
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plugin->file_mtime != statbuf.st_mtime ||
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plugin->file_size != statbuf.st_size)
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continue;
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}
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if (!_priv_gst_registry_chunks_save_plugin (&to_write, registry, plugin)) {
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GST_ERROR ("Can't write binary plugin information for \"%s\"",
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plugin->filename);
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}
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}
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_priv_gst_registry_chunks_save_global_header (&to_write, registry,
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priv_gst_plugin_loading_get_whitelist_hash ());
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GST_INFO ("Writing binary registry cache");
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cache = gst_registry_binary_cache_init (registry, location);
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if (!cache)
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goto fail_free_list;
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/* write magic */
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if (gst_registry_binary_cache_write (cache, file_position,
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&magic, sizeof (GstBinaryRegistryMagic)) !=
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sizeof (GstBinaryRegistryMagic)) {
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GST_ERROR ("Failed to write binary registry magic");
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goto fail_free_list;
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}
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file_position += sizeof (GstBinaryRegistryMagic);
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/* write out data chunks */
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for (walk = to_write; walk; walk = g_list_next (walk)) {
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GstRegistryChunk *cur = walk->data;
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gboolean res;
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res = gst_registry_binary_write_chunk (cache, cur, &file_position);
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_priv_gst_registry_chunk_free (cur);
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walk->data = NULL;
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if (!res)
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goto fail_free_list;
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}
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g_list_free (to_write);
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if (!gst_registry_binary_cache_finish (cache, TRUE))
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return FALSE;
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return TRUE;
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|
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/* Errors */
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fail_free_list:
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{
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for (walk = to_write; walk; walk = g_list_next (walk)) {
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GstRegistryChunk *cur = walk->data;
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if (cur)
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_priv_gst_registry_chunk_free (cur);
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}
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g_list_free (to_write);
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|
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if (cache)
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(void) gst_registry_binary_cache_finish (cache, FALSE);
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/* fall through */
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}
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fail:
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{
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return FALSE;
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}
|
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}
|
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|
|
|
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/* Registry loading */
|
|
|
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/*
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* gst_registry_binary_check_magic:
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*
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* Check GstBinaryRegistryMagic validity.
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* Return < 0 if something is wrong, -2 means
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* that just the version of the registry is out of
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* date, -1 is a general failure.
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*/
|
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static gint
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gst_registry_binary_check_magic (gchar ** in, gsize size)
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{
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GstBinaryRegistryMagic *m;
|
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|
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align (*in);
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GST_DEBUG ("Reading/casting for GstBinaryRegistryMagic at address %p", *in);
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unpack_element (*in, m, GstBinaryRegistryMagic, (*in + size), fail);
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|
|
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if (strncmp (m->magic, GST_MAGIC_BINARY_REGISTRY_STR,
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GST_MAGIC_BINARY_REGISTRY_LEN) != 0) {
|
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GST_WARNING
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("Binary registry magic is different : %02x%02x%02x%02x != %02x%02x%02x%02x",
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GST_MAGIC_BINARY_REGISTRY_STR[0] & 0xff,
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GST_MAGIC_BINARY_REGISTRY_STR[1] & 0xff,
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GST_MAGIC_BINARY_REGISTRY_STR[2] & 0xff,
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GST_MAGIC_BINARY_REGISTRY_STR[3] & 0xff, m->magic[0] & 0xff,
|
|
m->magic[1] & 0xff, m->magic[2] & 0xff, m->magic[3] & 0xff);
|
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return -1;
|
|
}
|
|
if (strncmp (m->version, GST_MAGIC_BINARY_VERSION_STR,
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GST_MAGIC_BINARY_VERSION_LEN)) {
|
|
GST_WARNING ("Binary registry magic version is different : %s != %s",
|
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GST_MAGIC_BINARY_VERSION_STR, m->version);
|
|
return -2;
|
|
}
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
GST_WARNING ("Not enough data for binary registry magic structure");
|
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return -1;
|
|
}
|
|
|
|
/**
|
|
* gst_registry_binary_read_cache:
|
|
* @registry: a #GstRegistry
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|
* @location: a filename
|
|
*
|
|
* Read the contents of the binary cache file at @location into @registry.
|
|
*
|
|
* Returns: %TRUE on success.
|
|
*/
|
|
gboolean
|
|
priv_gst_registry_binary_read_cache (GstRegistry * registry,
|
|
const char *location)
|
|
{
|
|
GMappedFile *mapped = NULL;
|
|
gchar *contents = NULL;
|
|
gchar *in = NULL;
|
|
gsize size;
|
|
GError *err = NULL;
|
|
gboolean res = FALSE;
|
|
guint32 filter_env_hash = 0;
|
|
gint check_magic_result;
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
GTimer *timer = NULL;
|
|
gdouble seconds;
|
|
#endif
|
|
|
|
/* make sure these types exist */
|
|
GST_TYPE_ELEMENT_FACTORY;
|
|
GST_TYPE_TYPE_FIND_FACTORY;
|
|
GST_TYPE_INDEX_FACTORY;
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
timer = g_timer_new ();
|
|
#endif
|
|
|
|
mapped = g_mapped_file_new (location, FALSE, &err);
|
|
if (G_UNLIKELY (err != NULL)) {
|
|
GST_INFO ("Unable to mmap file %s : %s", location, err->message);
|
|
g_error_free (err);
|
|
err = NULL;
|
|
}
|
|
|
|
if (mapped == NULL) {
|
|
/* Error mmap-ing the cache, try a plain memory read */
|
|
|
|
g_file_get_contents (location, &contents, &size, &err);
|
|
if (err != NULL) {
|
|
GST_INFO ("Unable to read file %s : %s", location, err->message);
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
g_timer_destroy (timer);
|
|
#endif
|
|
g_error_free (err);
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
/* This can't fail if g_mapped_file_new() succeeded */
|
|
contents = g_mapped_file_get_contents (mapped);
|
|
size = g_mapped_file_get_length (mapped);
|
|
}
|
|
|
|
/* in is a cursor pointer, we initialize it with the begin of registry and is updated on each read */
|
|
in = contents;
|
|
GST_DEBUG ("File data at address %p", in);
|
|
if (G_UNLIKELY (size < sizeof (GstBinaryRegistryMagic))) {
|
|
GST_ERROR ("No or broken registry header for file at %s", location);
|
|
goto Error;
|
|
}
|
|
|
|
/* check if header is valid */
|
|
if (G_UNLIKELY ((check_magic_result =
|
|
gst_registry_binary_check_magic (&in, size)) < 0)) {
|
|
|
|
if (check_magic_result == -1)
|
|
GST_ERROR
|
|
("Binary registry type not recognized (invalid magic) for file at %s",
|
|
location);
|
|
goto Error;
|
|
}
|
|
|
|
if (!_priv_gst_registry_chunks_load_global_header (registry, &in,
|
|
contents + size, &filter_env_hash)) {
|
|
GST_ERROR ("Couldn't read global header chunk");
|
|
goto Error;
|
|
}
|
|
|
|
if (filter_env_hash != priv_gst_plugin_loading_get_whitelist_hash ()) {
|
|
GST_INFO_OBJECT (registry, "Plugin loading filter environment changed, "
|
|
"ignoring plugin cache to force update with new filter environment");
|
|
goto done;
|
|
}
|
|
|
|
/* check if there are plugins in the file */
|
|
if (G_UNLIKELY (!(((gsize) in + sizeof (GstRegistryChunkPluginElement)) <
|
|
(gsize) contents + size))) {
|
|
GST_INFO ("No binary plugins structure to read");
|
|
/* empty file, this is not an error */
|
|
} else {
|
|
gchar *end = contents + size;
|
|
/* read as long as we still have space for a GstRegistryChunkPluginElement */
|
|
for (;
|
|
((gsize) in + sizeof (GstRegistryChunkPluginElement)) <
|
|
(gsize) contents + size;) {
|
|
GST_DEBUG ("reading binary registry %" G_GSIZE_FORMAT "(%x)/%"
|
|
G_GSIZE_FORMAT, (gsize) in - (gsize) contents,
|
|
(guint) ((gsize) in - (gsize) contents), size);
|
|
if (!_priv_gst_registry_chunks_load_plugin (registry, &in, end, NULL)) {
|
|
GST_ERROR ("Problem while reading binary registry %s", location);
|
|
goto Error;
|
|
}
|
|
}
|
|
}
|
|
|
|
done:
|
|
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
g_timer_stop (timer);
|
|
seconds = g_timer_elapsed (timer, NULL);
|
|
#endif
|
|
|
|
GST_INFO ("loaded %s in %lf seconds", location, seconds);
|
|
|
|
res = TRUE;
|
|
/* TODO: once we re-use the pointers to registry contents, return here */
|
|
|
|
Error:
|
|
#ifndef GST_DISABLE_GST_DEBUG
|
|
g_timer_destroy (timer);
|
|
#endif
|
|
if (mapped) {
|
|
g_mapped_file_unref (mapped);
|
|
} else {
|
|
g_free (contents);
|
|
}
|
|
return res;
|
|
}
|